Scratch nail structure for fixing fire resistant materials for boiler

Abstract

The invention provides a scratch nail structure for fixing fire resistant materials for a boiler. The connection between the head part and the tail part of the scratch nail is reliable, the desoldering is avoided, the connection of the head part and the tail part is still reliable even when a soldering seam is disengaged, the fire resistant materials cannot fall off, and the operation safety and the operation reliability of the boiler are improved. The scratch nail structure comprises a head part structure and a tail part structure, wherein the upper part of the tail part structure is outwards projected, and the head part structure is an outward opening expansion structure with an angle. The scratch nail structure is characterized in that the lower part of the tail part structure is provided with an outward projection hook, and the outward projection hook is welded and connected after hooking the center lower bending position of the outward opening expansion structure with the angle.

Description

technical field [0001] The invention relates to the technical field of a nail structure for refractory materials, in particular to a nail structure for fixing refractory materials for boilers. Background technique [0002] As a thermal equipment, boilers are widely used in various fields. The boiler burns various fuels, and the temperature of the flue gas is very high. It is often necessary to build refractory insulation materials for heat preservation. The refractory materials are relatively thick in high temperature areas, and refractory and thermal insulation castables are often used for construction convenience. The refractory and thermal insulation castables are fixed by nails, see the existing structure of nails figure 1 , it is divided into head and tail, the upper part of the tail is protruding, the lower part is in direct contact with the upper end of the head and connected by welding, and the lower end of the head is an outward flared structure with an angle. ...

AI Technical Summary

Problems solved by technology

The refractory and thermal insulation castables are fixed by nails, see the existing structure of nails figure 1 , it is divided into head and tail, the upper part of the tail is protruding, the lower part is in direct contact with the upper end of the head and connected by welding, the lower end of the head is an outward flared structure with an angle, due to the high temperature of the flue gas and the variable load When the temperature of the flue gas changes rapidly, alternating stress often occurs at the weld, which leads to cracking of the weld, which in turn leads to the shedding of the refractory material, which seriously affects the safety and reliability of the boiler operation.

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